Pattern-drafting machine.



c. AQSNIDER.

PATTERN DRAFHNG MACHINE.

APPLICATION FILED MAY 24, 1917.

Patented June 25, 1918.

z susns-sn sar 1..

R o m E V m N n WITNESSES ATTORNEY C. A. SNIDER.

PATTERN DRAFTING MACHINE.

APPLlCATION FILED MAY 24, I917.

Patented J 11116 25, 1918.

2 SHEETSSHEET 2.,

WITNESSES ATTORNEY cnnnnns AwSNIDER, or BOISE, IDAHO.

rarrnnn nnarrme MACHINE.

arness.

Specification of Letterslatent.

Patented June 25, 19112.

Application filed Ma ne, i917. Serial No. 170,708.

To all whom it may concern Be it known that I, GHARnL's A. -SNIDER,-a

citizen of the UnitedStates, residing at Boise, in the county of Ada and Stateof Idaho, have invented certain -new and useful Improvements in Pattern *Drafting Machines, ofwhich'the following is a specification. I

This invention has relation to' pattern drafting'machines, with special reference to machines for laying out patterns for sheet inetalwork.

An object of-tlie invention is to provide-a machine designed particularly for-laying out sections of an elloow joint of sheet metal tub ing, and embodies two adjustments; one adjustment for setting the machine to thediameter of thetube,-and the other for setting the machine to the rise of the sections, or the greatest width of the section to be drafted Another obj ectof the invention is to provide a machine of the character above described embodying m'eans for supporting a roll. of paper, and whereby-the paper may be drawn through the machinewhile the layoutof the pattern is inscribed thereon.

A. still further object of theinvention is to provide an improvement in amachine of this class whereby thescopeof operation of' the machine may be doubled or 'treloled, as

desired.

In addition to the foregoing my invention" comprehends improvements in the details of eonstructlon *and arrangement of the correlated parts to be hereinafter more fully described and particularly set forth in the appended claimsf 1 1n the accompanyin drawings inwhich' similar and .correspon ing parts are designated by the same characters off-reference throughout the several views in which they appear:

Figure 1,. is a view in plan ofa "machine constructed in accordance with my invention.

Fig. 2, is a view of the machine in side elevation with parts'broken away.

Fig. 3, is a horizontal section taken on the line 33 of the preceding figure.

. Fig.4, is a detailsection taken on the line 4+4- of Fig. 1.

Fig. 5, is a detail View in perspective, and

Fig. 6, is a diagrammatic view illustrating the nature of the machine.*

resilient material.

work accomplished by the Fig. 7 is a detail view illustrating one of thefscales.

With reference to the drawings, 10 indicates a base hoard providedat one end with. a pair of upstanding supports 11 designed to supporta shaft 12 for'rotation. A similar pair (if-uprights 13 is mounted upon the op; posite end of the baseboard to support a shaft 14 which may be rotated through "the 1 medium of acrank 15. A roll of paper'l6 is mounted upon the shaft'12 and the free end of the paper is secured to the shaftla after passing over the upper surface of the base board whereby by rotating the shaft 14; through the medium of its crank the paper may be unwound from the roll 16 and upon the shaft 15. i

Mounted at opposite "longitudinal sides of the-base board, and adjacent the roll of paper 16 is a pair of uprights 17 connected at their upper ends through themedium of a pair of'tran-sversely extending spaced guide bars 18. The uprights 17 are alsolco'nnected through the medium of a pair of vertically spaced strips 19, the lowermost ofwhich one end supported upon the lowermost of the strips 19 and the opposite end upon the,

strip 20 to support at a point intermediate its ends a hearing member 21 in which a.

spindle 22 is 'jo'urnaled. The upper end of the spindle 22 supports a disk 23 of thin,

A screw threaded we '24 a mounted be neath the disk 28 and arranged radially -relative to said disk, with one end journaled in one of the uprights 17, anditsopposite end journaled in the support20. From Fig. of'the drawings it will be noted that a thimble 254s threadedly engaged upon the rod 24:, said thinrble being designed to loosely support a friction wheel26 which is of a diameter equal to the vertical spacing of the disk23 aloove the base board whereby to con-1 tact simultaneouslywith the base board and the under side of said disk 23. A second friction wheel 27 is mounted upon the thinlble conceiitrically to the wheel 26 and secured to said wheel 26 for rotation therewith. The thiinble also carries an arm 28 rotatably supporting at its outer end a fric tionwheel 29 corresponding in diameter to angles to form a cross shaped device secured I the diameter of the wheel 27 and normally engaging the periphery thereof. A pointer 30 is secured to the thimble at one end, with its opposite end extending into the space between the above mentioned transversely ex tending strips 19 whereby to retain the thimble against rotation, and also to indicate the position of the thimble upon the scale which is mounted upon the lowermost of the strips 19, the adjacent end of the pointer 30 being bent downward for that purpose.

Mounted eccentrically upon the upper surface of the disk 23 is a pin 31. A slidable element illustrated in Fig. 5 is provided and whichcomprises bars 32 and 33 arranged in superposed relationv and at relative right together, and the upper bar32 is provided at a point intermediate its ends with an upstanding pin 34. The lower bar 33 is chans neled throughout-its length to receive therein the pin 31 of the disk 33. The sliding deing, longitudinally spaced guide rods 37 spaced below the strip 36. A sliding block 38 is provided,.having apertures in which the rods 37 are received whereby the block may be moved along the rod, said block hav ing a forward extension 39 apertured to receivea pencil or other scribing member 40 adapted to engage. the surface of the paper as the same is drawn therebeneath. The block 38 is also provided with an upstanding pin 4l. A threaded rod 42 is provided, having one end journaled in a bearing 43 formed by bending upone edge of the connecting strip 36, the other end of the rod being journaled in a p late 44'secured to one of the transverse guide members 18. A threaded sleeve45, is mountedilpon the rod 42 for movement longitudinally thereof said sleeve having a depending boss '45 apertured for engagement with a complementary boss 46 mounted upon a sleeve 47 which is located beneath said sleeve 45. A screw48 connects thebosses ofthe sleeves so as to permit relativeoscillatory movement thereof. The lower sleeve 47 is designed tosupport a tubular member 49 in contiguous relation to .the threaded rod 42 wherebyto receive therein at one end in slidable engagement, a rod 50 having one end enlargedand apertured as at 51 to receive the pin 34 of the sliding device, a similar rod 52 being inserted in the opposite end of the sleeve and likewise formed with an apertured enlargement 53 wherein to receive the upstanding pin 41 of the block 38. To indicate the longitudinal movement of the upper sleeve, said sleeve is provided with a pointer 54 which moves over a scale 55 supported at one end upon the bearing 43 and at its opposite end upon the plate 44.

Fig. 6 of the drawings illustrates diagrammatically a view of an elbow joint, and the pattern of one of the sections as traced by my machine. In operation, the machine is first adjusted with reference to the diameter of the pipe, indicated at ab. The friction wheel 26 is adjusted away from the center of the disk '23, to a distance corresponding to one-half of ab. In other words if the pipe is eight inches in diameter, the wheel 26 will be spaced from the center of the disk 23 to a radial distance of four inches as will be indicated by the pointer 30 upon the scale associated therewith. The next adjustment is made relative to the rise of the section or the distance (:b. This is accomplished by rotating the threaded rod 42 so as to move the sleeve 45 longitudinally thereon in one direction or the other, from zero at the center of the scale until the pointer 54 is opposite a graduation of the scale corresponding to the amount of the rise.

If the crank 15 is now rotated so as to move the paper in the direction of the arrow, the friction wheel 26 will be rotated, in turn rotating the disk 23, the rotation of which owing to the location of the in 31 carried thereby in the channel mem er 33 of the sliding element causes oscillation of the sleeve 49. Obviously, the sliding device shown in detail in Fig. 5 travels in a straight line diametrically across the disk 23, and owing to such movements imparts a similar linear movement of the block 38, the rods 52 and 50 having sliding movement in the sleeve49 to permit rectilinear movement by oscillation of said sleeve. Movement of the paper is continued until the disk 23 has completed a revolution. Owing to the movement of the paper beneath the pointer 40, and the lateral movement of said pointer caused by operation of the mechanism as de scribed above, a curve will be drawn upon the paper corresponding substantially to the configuration shown in Fig. 6, thereby delineating the exact curvature and outline of the section a;-b of the pipe. The greatest width 0-6 of the pattern corresponding to the rise 0-?) of the pipe section.

If a pattern is to be drafted of a section of tubing greater in diameter than the diameter of the disk 23 auxiliary fixtures 27 and 29 are used. Thus, the arm 28 is moved to a vertical position so as to dispose the friction .wheel 29 in .contact with the under sides of the disk 23, thereby raising the edge r the disk 27 being thin and formed of re-,

of said disk outof contact with the disk26,

silient material, readily permits of this movement and furthermore returns to nor-,

mal shape when the wheel 29 is subsequently depressed. Movement of'the disk 23 ,bycontact with the paper is then transmitted through the medium of. the wheel 27 to the wheel 29, and thence to the disk 23. The ratio of movement between the disks 26 and 23 is thenreduced by one-half, thereby permitting the inscribing of a pattern of a length twice the diameter of the disk 23. It will be apparent that the ratio may be varied by varying the relative "diameters of the disks 27 and 29 so as to enable the machine to inscribe patterns of tubing of a still greater diameter than the diameter ofthe disk 23. a

While I have illustrated and described my invention with some degreeof particularity,

I realize that in practicevarious alterations thereover may be made, and I therefore desire 1 to reserve the right and privilege of,

changing the form of the details of 0011 'struction, or otherwise altering the arrange ment of the correlated parts, without departing from the spirit of the invention or the scope of the appended claims.

Having thus described my invention, What I claim as new and desire to secure by Letters Patent is 1. A pattern drafting machine, including a marker element, mounted for movement,

means for moving said marker element, means for moving a strip ofpaper beneath the marker, and means'operable by and in proportion to the movement of the paper for moving saidmarker moving means; 1

2. A pattern drafting machine, including-F a marker, mounted for rectilinear movement, means for moving said marker, means for moving a strip of paper beneath the marker in a direction at right angles to the movement of the marker, and means operable by and in proportion to the movement of the paper for moving said marker moving means.

3. A pattern drafting machine, including a marker, means for moving a strip of paper beneath the marker, a rotatable element, means operable by and in proportion to the movement of the paper for rotating said rotatable element, and means operable by said rotatable element for moving the marker in a' direction at right angles to the direction of movement of the paper.

4-. A pattern drafting machine including a marker mounted for rectilinear movement, means for moving a strip of paper beneath the marker in a direction at right angles to the direction of movement of said marker, a rotatable member, means operable by and in proportion to the movement of the paper for rotating said element, and

means operable by rotation of said element for moving the marker.

5. A pattern drafting machine including a marker mounted for rectilinear movement, means for moving a strip of paper beneath the marker in a direction at right angles to the direction of movement of said marker, a rotatable element, means mounted for rectilinear movement for moving said marker, means operable by rotation of the rotatable element for moving said rectilinear movable means, and means operable by and in proportion to the movement of the paper,

for rotating said rotatable element.

6. A pattern drafting machine including a marker mounted for rectilinear movement, means for moving a strip of paper beneath the marker, a rotatable element, means operable bymovementof said element for moving the marker, means for varying the ratio of movement between the element and the marker, means operable by movement of and in proportion to the movement of the paper for rotating said element, and means for varying the ratio between the movement of the paper and said element.

7 A pattern drafting machine including a marker mounted for rectilinear movement,

' means for moving a strip of paper beneath themarker 1n a d1rect1on at rlght angles to the direction of movement of said marker, an elementmountecl for rectilinear movement,

means for transmitting motion from said element to the market, means for varying the ratio of movement between said element and said marker, a rotatable element, means forconverting rotary movement of said element into rectilinear movement of the first Y mentioned element, means operable by and in proportion to the movement of the paper for rotating said rotatable element, and means for varying the relative rate of movement between the paper and said rotatable element.

8. A pattern drafting machine including a marker mounted for rectilinear move-- ment, means for moving a strip of paper beneath the marker in a direction at right angles to the direction of movement of said marker, a sliding element mounted for rectilinear movement in a direction parallel to the direction of movement of the marker, an oscillatable member fulcrumed for transmitting movement from the sliding element to the marker, said fulcrum being adjustable to vary the rate of movement between said sliding member and marker, a rotatable member, means for transmlttmg rotary motion of said member to rectilinear movement of the sliding element, means operable by and in proportion to the rate of movement of the paper for rotating said rotatable member, and means for varying the rate of movement between said paper and said rotatable member.

9. A-pattern drafting machine including a direction at right angles to the direction of movement of the marker, a sliding element mounted for rectilinear movement in a direction parallel to the direction of movement of the marker, an oscillatable arm connected at its ends to the marker and slid ing element, a movable fulcrum point for supporting said oscillatable arm whereby to vary the rate of movement between the sliding element and the marker, a rotatably mounted disk, means operable by rotation of said disk for moving the sliding element, a friction disk engaging simultaneously the first mentioned disk and the paper whereby to transmit motion from the moving paper to the first mentioned disk,and means for moving the second mentioned disk radially relative to the first to vary the rate "of movement between the paper and the first mentioned disk. y

10. A pattern drafting machine including a marker mounted for rectilinear move-.

ment, means for moving a strip of paper beneath the marker in a direction at right angles to the direction of movement of said marker, a sliding element mounted for rectilinear movement in a direction parallel to. the direction of movement of the marker, a sleeve mounted for oscillation between the marker and sliding element, means for vary: ing the'fulcrum point of the sleeve, rods connected to the marker and sliding element I and telescopically engaged in the sleeve Copies of this patent maybe obtained for.

whereby the marker may be moved through movement of the slidingelement, and the ratezof movement between said rectilinear movable elements varied, a disk mounted for rotation adjacent the sliding element, a pin eccentrically mounted on the disk engaging. the sliding element to move the same by rotation of the disk, a friction disk engaging simultaneously the paper and the first mentioned disk, and means for moving the secondmentloned disk relatively to the first to vary the rate of movement between the paperand the first mentioneddisk.

smaller. disk, carried by said friction disk, a "fourth disk mounted for periphery engagement with the last mentioned disk and :adapted to engage the first mentioned disk whereby movement of the paper may be imparted to the first mentioned disk to move said disk at a rate less than the rate of movement of the paper.

In testimony whereof I aflix my signature in presence of two witnesses.

I CHARLES A. SNIDER. Witnesses r H. O. GEBAUER,

I Baron E. STEWART.

five celnts each, by addressing the Commissioner of Patents, Washington, D. C. I 

